need help explaining asap please :(

Different types of selection may occur within a species in response to environmental change. Which of the following would provide evidence that stabilizing selection is occurring in response to environmental conditions?

A shift in a population's frequency curve from an intermediate phenotype to an extreme phenotype
A shift toward equal distribution of all phenotype frequencies, including intermediate and extreme phenotypes
An increase in the frequency of extreme phenotypes and a decrease in the frequency of intermediate phenotypes
An increase in the frequency of intermediate phenotypes and a decrease in the frequency of extreme phenotypes

Answer:

B. Carbon Dioxide

Answer:

carbon dioxide

Explanation:

hope this helped :)

Answer:

A

Explanation:

I would go with A. "Because.. blah etc".

Answer:

Video games are the reason children are interested in learning

Explanation:

It would motivate most kids to learn, which is a benefit for classrooms/teachers

Following in the order in which they appear in electron transport. rank the compounds from first to last appearance in electron transport are

First appearance: FAD, NAD+

Last appearance: O2

Electron transport is a process that occurs in the mitochondria of eukaryotic cells during cellular respiration. During this process, electrons are passed along a series of protein complexes, which creates a proton gradient that is used to generate ATP. The electron transport chain consists of several molecules and proteins, including FAD, NAD+, and \(O_2\).

FAD (flavin adenine dinucleotide) and NAD+ (nicotinamide adenine dinucleotide) are electron carriers that are reduced when they accept electrons.

They are among the first molecules to appear in the electron transport chain, as they accept electrons from other molecules, such as glucose, during earlier stages of cellular respiration.

\(O_2\) (oxygen) is the final electron acceptor in the electron transport chain. As electrons are passed along the chain, they become increasingly energized.

Finally, they are passed to \(O_2\), which is reduced to form water. \(O_2\) is therefore the last molecule to appear in the electron transport chain, as it is the final destination for the electrons that are being transported.

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The correct order of appearance in electron transport for the compounds FAD, O2, and NAD+ is:First Appearance: FAD,Second Appearance: NAD+,Last Appearance: O2

During cellular respiration, FAD and NAD+ act as electron carriers, accepting electrons from other molecules and donating them to the electron transport chain. The electron transport chain is a series of membrane-bound proteins that pass electrons from one to another, ultimately reducing O2 to water. FAD is the first electron carrier to pass electrons to the electron transport chain, followed by NAD+. O2 is the final electron acceptor in the electron transport chain, accepting electrons and protons to form water. Therefore, the correct order of appearance in electron transport for the compounds FAD, O2, and NAD+ is FAD, NAD+, and O2.

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During the process of learning, the brain shows a characteristic called Plasticity.

The ability of the brain to reconfigure its structure and function biologically, chemically, and physically is referred to as brain plasticity, also known as neuroplasticity. Neuroplasticity can develop as a result of brain damage or as a result of learning, experience, and memory formation.

New neural pathways become stronger with learning and new experiences, whereas less-used neural pathways weaken and eventually die. Synaptic pruning is the name of this procedure.

Recent studies suggest that mature brains continue to display plasticity as a function of learning, despite being usually linked with changes in childhood. Neuroplasticity has protective effects on trauma management during human development. Learning a second language or a musical instrument can also boost neuroplasticity.

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Answer: Thank you for the answer I got it right

Explanation: 1+1=2 thanks

Question:

Which sentence describes a task on which a genetic engineer is most likely to work?

Answer Choices:

A. modifying the traits of a bacterium

B. conducting a field survey of a plant disease

C. examining physical objects for fragments of DNA

D. compiling the desirable properties of a plant species

Answer:

C) examining physical objects for fragments of DNA

Answer:

desnity is equal weight divided by volume ,so 72/20= 3.6

Explanation:

Hope this helps

Answer:

B

Explanation:

Diatomic molecules are molecules composed of only two atoms, of the same or different chemical elements. The prefix di- is of Greek origin, meaning "two".

The word "di" means two, and "diatomic" means a molecule with two atoms that is present in Option B. Diatomic molecule may consist of similar atoms or may have different atoms, such as nitrogen oxide.

Diatomic molecules are those that have two atoms within the molecule, such as hydrogen (H₂), nitrogen oxide, etc. In a single compound, there are many atoms that are present, and they make different bonds with each other, such as the covalent bond.

Aside from the covalent bond, there are other types of bonds, such as ionic bonds, but not all types of elements that are present in the periodic table can form the diatomic molecule. The homonuclear diatomic molecule is hydrogen, where two hydrogen atoms are present, and an example of the heteronuclear diatomic molecule is nitrogen oxide, where nitrogen and oxygen atoms are present.

Hence, the correct answer is option B, which is a diatomic molecule with two atoms.

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Answer:

that living organisms are made up of cells, that they are the basic structural/organizational unit of all organisms, and that all cells come from pre-existing cells.

Explanation:

Answer:

Smothering and Starving

Explanation:

1. Smothering:

This is one of the effective method for extinguishing of a petrol fire. It can be achieved by removing the oxygen from the atmosphere by applying a blanket of foam over burning surface. This will help in introducing carbon dioxide (CO2) and inert gas to the immediate vicinity of the fire help in fire control.

2. Starvation:

Here, fire can be extinguished simply by removing the fuel source, accomplished in a number of ways such as stopping the flow of liquid or gaseous fuel, removing solid fuel in the path of the fire or allowing the fire to burn until all of the fuel is consumed.

Both these methods are effective for extinguishing a petrol fire.

The collaboration was particularly visible during Kevin's lifesaving by exhibiting the sudden execution of all of the health and safety courses they received throughout their Red Cross training.

Red Cross training prepares individuals to respond to emergencies and disasters by providing them with the necessary skills and knowledge to provide first aid, CPR, and other types of assistance. Red Cross training programs include courses for both individuals and organizations, and cover a range of topics, from basic life support to disaster response and recovery.

Red Cross training is conducted by certified instructors who have experience and expertise in emergency response and disaster management. The courses are designed to be interactive and hands-on, providing participants with opportunities to practice and apply their skills in real-life scenarios.

Red Cross training can help individuals become more confident and prepared in emergency situations, and can also be a valuable asset for organizations, businesses, and communities looking to improve their readiness and resilience. By completing Red Cross training, individuals can contribute to building more resilient and safer communities.

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In the United States, the middle school model typically includes three years of elementary school. The education system in the United States generally consists of three main levels: elementary school, middle school (also known as junior high school), and high school.

Elementary school typically encompasses grades kindergarten through fifth or sixth grade, depending on the specific school district. After completing elementary school, students transition to middle school, which usually covers grades six to eight. This means that students spend three years in middle school before progressing to high school. However, it's important to note that educational structures can vary across different states or school districts, so there may be slight variations in the specific grade ranges for elementary and middle schools.

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Answer:

A. Chloroplasts

Explanation:

These are cells that are found in plant cells but not animal cells.

Answer:

Chloroplasts

Explanation:

Plant cells use chloroplasts to create energy from the sun

The peptide sequence of the internal peptide, based on the given information, is K-E-W-T-M-V-R.

Based on the given information:

a) Amino acid analysis indicates the presence of K, M, E, W, V, T, and R in the peptide.

b) Treatment with FDNB and acid peptide sequence hydrolysis yields DNP-E and s-DNP-K, suggesting the presence of these amino acids in the sequence.

c) Trypsin treatment produces a tripeptide containing K, E, and V, and another tripeptide containing W, T, and M. Additionally, free arginine is obtained, indicating the presence of arginine.

d) Cyanogen bromide treatment results in a dipeptide containing W and T, and a pentapeptide containing R, E, V, M, and K.

Combining all the information, the sequence of the internal peptide can be determined as K-E-W-T-M-V-R. This sequence satisfies the given amino acid analysis and the results from the various treatments, consistent with the information provided.

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The variance of X, Var(X), for the hypergeometric distribution, the formula is: 1.67

The hypergeometric distribution has three parameters:central idea

N: the total population size (60 children in this case)

K: the number of success states in the population (40 non-breastfed children in this case)

n: the number of draws (5 children chosen in this case)

To calculate the variance of X, Var(X), for the hypergeometric distribution, the formula is:

Var(X) = n * (K / N) * ((N - K) / N) * ((N - n) / (N - 1))

Using the same values as before, we have:

Var(X) = 5 * (40 / 60) * ((60 - 40) / 60) * ((60 - 5) / (60 - 1))

= 1.67

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Nematocysts are stinging cells that can be found in the phylum Cnidaria. These specialized cells can capture prey and deter predators. The hydra and sea anemone are two cnidarian species that possess nematocysts. While the nematocysts of hydra and sea anemone share similarities, they have some key differences.Nematocysts of a hydraHydra is a freshwater cnidarian that has a tube-like body and is a simple polyp.

Hydra has three types of nematocysts: spirocysts, microbasic mastigophores, and atrichous isorhizas. Each of these nematocysts have specific functions. For example, spirocysts help in wrapping the prey while microbasic mastigophores help in penetrating the prey's skin.Nematocysts of a sea anemoneSea anemones are marine cnidarians that have a sessile polyp body. They have a different type of nematocyst, acrorhagi. Acrorhagi are elongated nematocysts present on the oral disc and tentacles of sea anemones.

These nematocysts contain toxic threads that can be used as a weapon to attack other cnidarians. In addition to acrorhagi, sea anemones also possess spirocysts, microbasic mastigophores, and atrichous isorhizas, like hydra.To summarize, the nematocysts of hydra and those of sea anemone have a similar structure, but sea anemones also possess elongated nematocysts called acrorhagi that can be used as a weapon.

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Phosphorylating ATP to form ADP and removing phosphate from ADP to form ATP in order to store and release energy. Option B.

ADP is continuously converted to ATP during cellular respiration upon the addition of phosphate. The main energy source for cellular metabolism is glucose, which is catabolized to ATP in three subsequent processes glycolysis, the tricarboxylic acid cycle TCA or the Krebs cycle, and finally oxidative phosphorylation.

When the phosphate group is removed by breaking the phosphoanhydride bond in a process called hydrolysis energy is released and ATP is converted to adenosine diphosphate ADP. Similarly, energy is released when the phosphate is removed from ADP to form adenosine monophosphate AMP. Adenosine triphosphate ATP is an energy source for use and storage at the cellular level. The structure of ATP is a nucleoside triphosphate composed of a nitrogenous base.

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The structural link between the CNS (Central Nervous System) and PNS (Peripheral Nervous System) is located in sensory neurons in the dorsal root and dorsal root ganglia.

The central nervous system (CNS) is a portion of the nervous system that includes the brain and spinal cord. It's one of two primary components of the nervous system, the other being the peripheral nervous system (PNS). The CNS is responsible for receiving sensory input from the body and responding with appropriate motor output. It is in charge of coordinating and interpreting data from the senses, as well as determining responses based on that data.

The CNS and PNS work together to regulate and maintain homeostasis within the body's systems. The structural link between the CNS and PNS is critical for the smooth transmission of signals between the two systems. These connections allow for communication and coordination between the central and peripheral components of the nervous system.

In summary, the structural link between the CNS and PNS is located in the sensory neurons in the dorsal root and dorsal root ganglia.

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The original experiment may be inaccurate and further experimentation is needed.

The accuracy of measurements depends on the quality of the measuring equipment and the skill of the scientists involved. For the data to be considered reliable the variability of the values ​​should be small. Repeated scientific research increases credibility. Results may change over the course of different studies or under different conditions.

It is therefore important that the experiment itself is reproducible. A reproducible experiment should but need not give the same results when performed by different people at different times and preferably under similar conditions. Repeating an experiment multiple times can help determine whether the data are random or normal. Avoid jumping to conclusions without sufficient evidence.

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Answer:

C

Explanation:

Answer:

Explanation:

True

Under the influence of antidiuretic hormone (ADH), the hormone produced is urine with a higher concentration. ADH, also known as vasopressin, is a hormone produced by the hypothalamus and released by the posterior pituitary gland. Its primary function is to regulate the body's water balance and osmolarity.

When ADH is released, it acts on the kidneys, specifically on the collecting ducts, to increase their permeability to water. This allows more water to be reabsorbed from the urine back into the bloodstream, reducing the volume of urine produced and increasing its concentration.

ADH increases the reabsorption of water by inserting aquaporin channels into the cells lining the collecting ducts, facilitating the movement of water molecules. As a result, more water is retained in the body, and the urine becomes more concentrated.

The production of concentrated urine under the influence of ADH helps to conserve water in the body, especially during times of dehydration or low water intake. It is an important mechanism for maintaining proper fluid balance and preventing excessive water loss.

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Answer: The food chain starts when krill eat phytoplankton. The krill is eaten by whales, squid and other fishes. The squid is then eaten by penguins and other animals. There are other animals that eat squid. Like the orcas or killer whales.

The following fill in the blanks are, Stratosphere, Mantle, Outer core, Inner core, Lithosphere, Geosphere

What is the atmosphere and its features?

A layer of gases known as the atmosphere envelops the planet Earth. The gravitational pull of the planet's neighbor, Earth, keeps it close to the surface. The three primary elements of the atmosphere are nitrogen, oxygen, and argon.

All life on Earth is shielded by the atmosphere, a layer of gases that regulates temperatures within a narrow range and deflects harmful solar rays.

Features of the atmosphere:

The distance between the atmosphere and space is infinite. until it "blends" into outer space, the atmosphere becomes less dense and denser.

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The correct statement is: They do not assort independently and do not produce Mendelian ratios for crosses tracking two or more genes.

Linked genes are genes that are located close to each other on the same chromosome.

Unlike genes that are located on different chromosomes, linked genes tend to be inherited together as a result of their physical proximity. This means that they do not assort independently during meiosis, breaking the principle of independent assortment proposed by Gregor Mendel.

When two or more genes are linked, their inheritance does not follow the expected Mendelian ratios observed for unlinked genes.

In Mendelian genetics, genes located on different chromosomes segregate independently into gametes and produce predictable ratios in offspring.

However, linked genes tend to stay together and are less likely to undergo recombination, resulting in deviations from Mendelian ratios in crosses involving multiple linked genes.

The phenomenon of genetic linkage and its impact on inheritance was one of the key discoveries in genetics that provided evidence for the existence of chromosomes and helped develop the concept of genetic mapping.

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The term used to describe a disease-causing microorganism is a pathogen. Pathogens are microorganisms that cause infections, which include viruses, bacteria, fungi, and parasites, among others. These microorganisms can cause a range of illnesses.

from minor infections like the common cold to severe diseases like tuberculosis, AIDS, and COVID-19. Pathogens are highly adaptive and can mutate rapidly, making them challenging to control and treat.Viruses are infectious agents that are composed of a protein coat and genetic material, either DNA or RNA. They can only reproduce inside host cells, causing various diseases like HIV, influenza, and COVID-19. Bacteria are single-celled microorganisms that can be found in almost every environment, including soil, water, and the human body.

Some bacteria are beneficial, while others are harmful and can cause infections like strep throat, pneumonia, and meningitis. In contrast, a microbe is a general term used to describe any microscopic organism, including bacteria, fungi, protozoa, and viruses.In conclusion, a pathogen is the term used to describe a disease-causing microorganism, which can include viruses, bacteria, and other microorganisms.

These pathogens are highly adaptive and can cause a range of illnesses, from minor infections to severe diseases. It is essential to understand the nature of pathogens to prevent and control the spread of infectious diseases.

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Answer:

the sun

Explanation:

the sun is energy that controls all weather activity. (pretty much)

Answer:

Are snails born with shells?

Explanation: